Lubricating arrangement for rotary device

ABSTRACT

A lubricating arrangement for rotary device having an internal rotating member. The arrangement comprising a sleeve put on rotating member; at least one inlet in sleeve, being perpendicular to rotating member, and having one end adjacent rotating member and the other end open to reservoir; at least one outlet in sleeve, being perpendicular to rotating member, and having one end adjacent rotating member and the other end open to reservoir; and a plurality of auxiliary outlets in sleeve and each having one end adjacent rotating member and the other end open to reservoir. Preferably, each auxiliary outlet is at an angle about 0° to about 30° with respect to an axis perpendicular to rotating member.

FIELD OF THE INVENTION

[0001] The present invention relates to lubricating arrangement and moreparticularly to a lubricating arrangement for rotary device withimproved characteristics.

BACKGROUND OF THE INVENTION

[0002] A conventional rotary device comprises an internal rotatingmember, a sleeve put on rotating member near one end, at least oneinlet, and at least one outlet. Both of inlet and outlet are in sleeveand are perpendicular to rotating member. Also, each of inlet and outlethas one end adjacent rotating member. In rotation of the rotary device,in addition to the high pressure lubricating oil, a force is generatedfor sucking lubricating oil from inlet to outlet through a gap betweenrotating member and sleeve. As a result, the rotary device may belubricated.

[0003] However, the prior art suffered from a disadvantage. For example,the arrangement of inlet and outlet does not facilitate lubricating oilto return to outlet after lubrication. This has a drawback such aslubricating oil flowed to external surface of rotary device. Hence, therotary device is dirty, heat dissipation of the rotary device ishindered, and useful life of rotary device is lowered. Thus improvementexists.

SUMMARY OF THE INVENTION

[0004] It is therefore an object of the present invention to provide alubricating arrangement for rotary device having an internal rotatingmember. The arrangement comprising a sleeve put on the rotating member;a reservoir; at least one inlet in the sleeve, being perpendicular tothe rotating member, and having one end adjacent the rotating member andthe other end open to the reservoir; at least one outlet in the sleeve,being perpendicular to the rotating member, and having one end adjacentthe rotating member and the other end open to the reservoir; and aplurality of auxiliary outlets in the sleeve and each having one endadjacent the rotating member and the other end open to the reservoir;wherein each of the auxiliary outlets is at an angle with respect to anaxis perpendicular to the rotating member.

[0005] In one aspect of the present invention, each of the auxiliaryoutlets is at an angle about 0° to about 30° with respect to an axisperpendicular to the rotating member. The above and other objects,features and advantages of the present invention will become apparentfrom the following detailed description taken with the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006]FIG. 1 is a side view in part section of a preferred embodiment ofrotary device according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Referring to FIG. 1, there is shown a rotary device 30constructed in accordance with the invention comprising an internalrotating member 31, a sleeve 32 put on the rotating member 31 near oneend, at least one inlet 33, and at least one outlet 34. Both of inlet 33and outlet 34 are in sleeve 32 and are perpendicular to the rotatingmember 31. Also, each of inlet 33 and outlet 34 has one end adjacentrotating member 31 and the other end open to reservoir 36. Mostimportantly, a plurality of auxiliary outlets 35 are formed in sleeve32. Similarly, each of auxiliary outlets 35 has one end adjacentrotating member 31 and the other end open to reservoir 36. Preferably,each auxiliary outlet 35 is at an angle about 0° about 30° with respectto an axis perpendicular to rotating member 31 (e.g., inlet 33 or outlet34) as viewed in FIG. 1. In rotation of the rotary device, in additionto the high pressure lubricating oil and suction force, lubricating oilmay generally completely return to outlet 34 after sucked from inlet 33and through a gap between rotating member 31 and sleeve 32 in alubrication cycle. This is because auxiliary outlets 35 have guideeffect in helping the return of lubricating oil. As a result, the rotarydevice can be fully lubricated.

[0008] While the invention has been described by means of specificembodiments, numerous modifications and variations could be made theretoby those skilled in the art without departing from the scope and spiritof the invention set forth in the claims.

What is claimed is:
 1. A lubricating arrangement for rotary devicehaving an internal rotating member, the arrangement comprising: a sleeveput on the rotating member; a reservoir; at least one inlet in thesleeve, being perpendicular to the rotating member, and having one endadjacent the rotating member and the other end open to the reservoir; atleast one outlet in the sleeve, being perpendicular to the rotatingmember, and having one end adjacent the rotating member and the otherend open to the reservoir; and a plurality of auxiliary outlets in thesleeve and each having one end adjacent the rotating member and theother end open to the reservoir; wherein each of the auxiliary outletsis at an angle with respect to an axis perpendicular to the rotatingmember.
 2. The lubricating arrangement of claim 1, wherein the angle isabout 0° to about 30°.